Research And Development Of Chemi-groundwood Process Device In Pulping And Paper Mill

The wood resources of china is very poor, the main raw material of pulp and paper is straw. The nature of raw material caused low quality pulp and paper, and high pollution load coming from production process. The main feature of Chemi-groundwood process is extraordinary high yield, and extraordinary low pollution load. Chemi-groundwood process is one of high yield pulping (HYP). This pulping process is very fit for Chinese need to rising scale of wood pulp, advancing pulp quality, saving energy, and cutting down pollution load. So that Chemi-groundwood process spread quickly in China from 1990.The research and development of Chemi-groundwood technological process and device is started from Europe and North America. Chinese Chemi-groundwood process and device was complete import in the first days. The author and his group researches and develop the process and device from 2001 in order to fit for the need of developing Chemi-groundwood and cutting down the high cost of import device.The article main discusses the development of 300 t/d chemi-groundwood process and main equipments, and the property of these equipments. Chemi-groundwood processes development, capacity and worldwide installations. Wood fiber characteristics and suitability for Chemi-groundwood are discussed as well as the pulp quality and end uses. The general practices and new development in chemi-groundwood process effluent treatment are also discussed.